Relay computer
About the Relay computer PCB
Relay computer is an open source PCB design by tinkerer9, published on GitHub. It is a 2-layer board measuring 140 × 210 mm, with 124 components from 6 distinct parts.
By type, the board carries 61 diodes, 33 resistors, 20 relays, 9 switches and 1 connector.
From the project
A relay computer that adds or subtracts two 4-bit numbers made for a Capstone project
There are nine switches on the bottom left—these are the inputs. The four on the top are the A3-A0 inputs, and the four on the bottom are the B3-B0 inputs.
On the the switch on the middle-right is the additon-subtraction selector. Switch it up to add the two numbers, and down to subtract them.
Use the default options for customizing your order. Use this table for reference:
Relay computer bill of materials (BOM)
124 components, 6 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Barrel_Jack_Switch | BarrelJack_Horizontal | J1 |
| 20 | SANYOU_SRD_Form_C | Relay_SPDT_SANYOU_SRD_Series_Form_C | K1, K2, K3, K4, K5, K6, K7, K8 +12 |
| 9 | SW_SPDT | MTS-102 | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +1 |
| 28 | 1N4007 | D_DO-41_SOD81_P7.62mm_Horizontal | D1, D2, D3, D4, D9, D10, D11, D12 +20 |
| 33 | LED | LED_D5.0mm | D5, D6, D7, D8, D17, D18, D19, D20 +25 |
| 33 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8 +25 |
Relay computer design files
The KiCad project lives in the tinkerer9/relay-computer repository on GitHub; these links point at the commit this page was built from.
- Layouthardware/board.kicad_pcb
- BOMdocs/bom.csv
Relay computer: common questions
How big is the Relay computer PCB?
The Relay computer measures 140 × 210 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Relay computer?
124 components, from 6 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Relay computer design files?
From the tinkerer9/relay-computer repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Relay computer design in my own project?
The repository has no license, so all rights stay with tinkerer9. Use it as a reference, and ask the author before reusing the design.